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2 Homometallic Alkoxides

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351<br />

[⊲Pr i O⊳4⊲ 3-OPr i ⊳2⊲ -OPr i ⊳Zr2⊲ -<br />

OPr i ⊳2Ba⊲ -OPr i ⊳2Ba⊲ -<br />

OPr i ⊳2Zr2⊲ 3-OPr i ⊳2⊲ -<br />

OPr i ⊳⊲OPr i ⊳4]<br />

[Ba2Cd2Ti4⊲ 3-OPr i ⊳4⊲ -<br />

OPr i ⊳12⊲OPr i ⊳8]<br />

[Ba2Cd2Zr4⊲ 3-OPr i ⊳4⊲ -<br />

OPr i ⊳12⊲OPr i ⊳8]<br />

[Ba2Cd2Hf2⊲ 3-OPr i ⊳4⊲ -<br />

OPr i ⊳12⊲OPr i ⊳8]<br />

6 6 ZrO, 1.924–1.940 (7)<br />

av. 1.930<br />

6 4 and 6 TiO, 1.752–1.979 (7)<br />

av. 1.849<br />

BaO, 2.873, 2.895 (6) ⊲ 3⊳<br />

2.551–2.787 (7) ⊲ ⊳<br />

av. 2.660<br />

ZrO, 2.219–2.252 (6) ⊲ 3⊳<br />

av. 2.239<br />

2.054–2.202 (6) ⊲ ⊳<br />

av. 2.127<br />

BaO, 2.422, 2.802 (6) ⊲ 3⊳<br />

2.337–2.702 (6) ⊲ ⊳<br />

av. 2.553<br />

6 4 and 6 ZrO, av. 2.044<br />

CdO, 1.959–2.280 (6)<br />

av. 2.101<br />

TiO, 2.124 ( 3, av.)<br />

1.969 ( ,av.)<br />

BaO, 2.719 ( 3, av.)<br />

2.521, 2.699 (11) ⊲ 2⊳<br />

6 4 and 6 HfO, av. 1.906<br />

CdO, 1.979, 2.179 (11)<br />

ZrO, 2.320 ( 3, av.)<br />

2.146 av. ( ,av.)<br />

BaO, 2.831 ( 3, av.)<br />

[⊲Pr i OH⊳2Ba⊲ -OPr i ⊳4fNb⊲OPr i ⊳4g2] 6 6 Pr i OH . Ba, 2.724,<br />

2.734 (7)<br />

NbO, 1.872–2.046 (8)<br />

av. 1.925<br />

2.552, 2.754 (8) ⊲ ⊳<br />

CdO, 2.160, 2.177 (9)<br />

HfO, 2.235 ( 3, av.)<br />

2.018 ( ,av.)<br />

BaO, 2.642–2.707 (7)<br />

NbO, 2.007–2.046 (7)<br />

ZrO, 171.6 (t, av.)<br />

BaO, 127.5 (b, av.)<br />

ZrO, 129.8 (b, av.)<br />

494<br />

– 495<br />

– 495<br />

– 495<br />

NbO, 124.4–135.2 (t)<br />

NbO, 125.9–160.4 (b)<br />

496<br />

(continued overleaf )

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